Buttonhole-working attachment for sewing-machines.



P. SPAULDING.

BUTTONHOLE WORKING ATTACHMENT PQR SEWING MACHINES.

APPLICATION FILED APRS, 1913.

Jlmag mam ma. Q, 1913.

2 SHEETSSHEET l.

FK SPAULDING.

BUTTQNHOLB WORKING ATTACHMENT POR SEWING MACHINES.

APPLICATION FILED APR.5, 1913.

l ,@@?29 Patente Dec. 9, 1913.

2 SHEETSSHBBT 2.

FEQQL.

I by the operator.

Vmeans for translating the movement oi the vde v ioe.

`ded and more edeotive means for accelerat- 4tribute to simplicity,as-vvill be understood .FRANKLIN SPAULDING,

oneven v0l? CHICAGO, ILLINOIS.

Epeeilioa'tion of Letters Patent.

Ap'plicatien filed April 5, 195.3.

Patented Bec. 9, 1913.A

Serial No. '159,055.

To all whom if may concern Be it known that L'FRANKLIN SPAUL- nino, acitizen of the United States, resid-I ing :it Chicago. in the county ofCook andj Stute or" illinois. have invented certain new; und nse'fuiimprovements in Buttonholel Working Attachments 'for Sewing Ma-j chines.of which the following is si specifi-j eration. 5

ll-his invention relates to device adapt-edi vto be attached toany ofthe Well Ilnioivn I. l domestic sowing machines and arranged toautomatically work buttonholes oi venous sizes without any lnenipulationor tne'oloth Ylie objects of the invention, generally ated. 'to provideon at taehinent in which l of the 'nnetions to produce a neet and securehuttoni'ioie eccomlisiied .hy the fewest possible nunil er oit lemen-is.v

y@ne olf the objects of the invention, started more peiwioularly, is vtoprovide .improved pivoted actuating lever to the friction clutch Anotherobject is to provide improved means for regulating or adjustingtheglength of the buttonhole to he formed.` f

A further object in to provide a simplithe movement of `the drivingWheel I'for the feederplate yfor the purpose of maur Another object isto provide animprover clutch device vwhich includes. a driving clutchand a retaming or backlash-preventingr4 clutch.

The invention also relates to an improved means for oscillating theoloth feeder plate, for guiding plate, and igor- 'switching sind pluto:it the ends ofthe huttonhole.

.The invention ,further contemplates the other detailsy .of constructionwhich con- ;isfthe description prooeecs. I.

gn the aeoompzinying d avi/ings, Figure 1' is' a top plan view 'of nhhuttonholeivvorling nttaclnnent embodying the features of my invention.y Fig. Q is n bottomiplan view of the attachment compl-ete. 3 is bot-tomplan view with the cloth feeder plete and .its rctainin late removed.Fie 451s e.

Fig. l. Fig. 5 is a horizontal sectional detuilnfiew illustrating themeans for accelerating ythe movement of the clutch Wheel which :rtuatesthe cloth feeder plate.l Fig. 6 is a fragmental detail fplan view ofsaid clutch wheel with the top plte thereof lreinoveih seid vieu7illustrating the retain' ingy or backlash-preventing portion of theclutch.. i

The attachment in the preferred form, which l linvV` herein shown,comprises a Abase plate 10 upon which are mounted the various mechanismso'f the attachment. A standard 11 rises iiom one end of the base plateand has at its upper` end aolamp or ,yoke

side elevation taken from the top side of' 12 adapted to embrace thevpresser-bar of i the sewing machine after the' presser-foot has beenremoved. A. screw 13, threaded in the yoke 12, is adapted to rigidlysecure the attachment to the presser-bar. i

rlivo lD-shaped plates 14 and 15 (Fig. 3.)

are kpvoted byl suitable pivot screwsl and 17 to the underside of .the`base plate -10.

Said plates have centralopenings 18 and -19 adapted to receive cams toVhe ,later -described'. The plates further have Slotsf() and 21 therein,the side edgesofwhichare v screws 24 and 25' Project, the headso saidscrews forming-.guides to directtherecipr cation ,of the feeder plate.'lIn the .present instance, this plate `is provided AWith a centralelongated opening 30, and the lplate 1is.

held in place by meansvo o spring-retaining Tplete 31 overlapping theedl opening, 30 .and securedfto the ase late 'llie spring plete 31 has atongue 32 whieh passes through .the opening 30 andhear's .the plates y14and'l, Saidoloth feeder 'glaive'`` ihaving a longitudinal vslot 29intowhichthe es oidos 10115 10 by means of the pivot screws 15 an `17.

agninstihe oscillating cam, to be presently described, forv the vpurposevof preventing movement of said com through momentum.l

erplat'e 28 isinounteda cloth feeder proper &nenth the forward end ofthe cloth feeder pinares is minted a. clothieedr element- -Y proper;said cloth toeder having a plu- .11o

engage the vieil) will mme- 'willi l u H u.) le leimm the needle n .i ACentral slet Nmlgh wlw .me reeipie iwted muy n? Iier, linee. pluie P s:nalen il? i meulj; Vl" 1 snaxelxrzf up nml la? simil', il?) e v Atftbl'ynimmitel. the niet: plete lt?,

eentizl eiwit :und

A ein tile opp. wheel ve plum f i ty idly qeif' ebelt. Between the tv ttie Clutch otlaei? eli-,tl le u pin en @weed te femm the :lily Inenn i'remuer i'lilis and has ieted ilifz-.i'ewitli leg (il wing 62,' :intlpin Gill in i simile, relation l clutch ined. The el i flog 119e forwardroiizitien ef binfla' ngninet une el i'wz'nel rotation enfls m holdelemente :fl4

de'- nmintninef.

gg 1,@ ee,

eut. ln 'this slot is adjustably mounte a nui in which ie threaded athumb screw 69, link Z0 is .mounted at one end upon the thumb screw andis pivetally attachee. at its other end to the adjacent end of the clothfeeder pl" 28.

arm T3 is pivote@ nt one end :is at 74, apen the uppei gifle el the baseplate, Suid anni having un angular upwardly extending und 75 which liebehind the feeding clutch K The arm has: rounded projection #u Centralshaft 52 of the clutch wheel @am plrte i' lies two ni'imte portions;portions, as illnetrzited in The engulev end 75 ie backward movement nonthe lov'veil end oi the sli-att 52 el' `the wheel 1S, tix il switch emni* y n Within the central opening in the nivetec plete l5, and nets teqweklj switli the Cloth feeder 'plate :it the ends et' thebi'sttenli-le.

The operation ef' the ettaelniient :is follows: Recipio 'etien ef theneedle bei' in the sewing machine Qseiletes the levei1 l() and thesegmental plate The ossi" ating movement et the plate l2 is een'nnmcated, to the-pivot fil/mit 43 in the form of intei'1nit- 'tent partialrotatie/ns thi-@ugh Athe medium ef the pawl Manel the inteliet Wheel 45.As tile cum 49, "which is fixed to the lower enfl ett" the pivot piu 43rotates, it engages the i :ills of the opening 18 in the plate lfl andoecillntes seid plate beek and forth. This oevilletien of the plate willhe communicated to the elotl` :eefler plate 28 by the gagement of screw24 'with the Wells et the guide slot in seid feeder plate. Tlf-:S theCloth gripper will move the cloth nel eith in a manner to cause Zig-zag;ttonliole stitcliee to be formed therein, ,i length of oscillation et'the lotli 'feeder plete enel thus the length of eall stitch may becent-felled by adjusting the seiew 24 longitudinally in its elet :20.'ln the oscillation of the toothed plate @l2 the screw F6 Will liecarried into intermittent enn gageme'nt with elle feeding clutch (leg 55te rotate the ClutchA Wheel 5l thi'eugli intel`- mitteilt partialrotations. Motion from the Glutei). Wheel will be imparted te the clothfeeder-plate 28 'through the medium of the linli 70 in the form ofstep-by-step advzur ing nievetfients to emxy the cloth past the needleel the sewing machine the entire of the liuttenliole.

'llie lengtlief each step imperte, te lise eletti l e, tiieret re tlie fistfmee between. e i. elles, may controlled by ufffm the screw teadvance itsl fern/eral enel, :t ing lentement will given te 5S in itsseat. By tuiw ELT:

5 lln a louttonliolewokinfg attachment, a oase plate7 an oscillatoryplate pivoted to the un ide el said bese plate and having an openingtherein zt cam fitting in seid opening., means for driving Said cuni, e,cloth feeder plate mounted for traveling movement beneath seidoscillatory plete, said oscillatory plate and said feeder plate lim/-ing lengitudinul .slots 'therein extending in the suine generaldirection, the elet irt seid oscillatory plate having undefent sidewalls, :t block in the latter slot engaging said side walls, and :lscrew lzliieecled in seid bleek and adapted to secure said bleek inplace, Seid Screw pi'ojeeting into the slet in seid feeder plate foreoimnnnienting motion 'tile-reto.

G. ln e buttnnhole wol-lling attachment, a plete, two oscillatory plaies'inflenendently pivelecl to the underside O lease plate end each havinga central opening 2o therein, an oscillating cam tting'in one of seidopenings, a switch cam' tting in the other opening, a Isloth feederplate mounted for traveling movement beneath said oscilln'toiy plates,said oscillatory plates and said feeder plate having slots thereinextending in the saine general direction, a pair of studs eaehndjustably mounted in the slot in one of said oscillatory platesandlvprojeet'ng into the slot in the feeder plate, and means for drivingsaid switch cam and said oscillating cani,

ln testimony whereof eflix my signature in the presence of twowitnesses. H

FRANKLlN SPAULDING.

'Vlfit nzses: ,Y

en MARQUARDT, ltfri KAFEA.

